Problem with allignment? Or is it something else?

GREG225

LEXUS

I bought a used lexus 300es 1994. It drove perfect when I bought it. 3000 miles late it started pulling to the right so I took it in for an allignment. The shop said the alligned it but it still pulled slightly to the right. They said it was due to the tires. I bought 2 new tires but put them on the back and put the old tires on the front. 300 miles later the car started pulling hard to the right again and yesterday I had a blow out on the front right. I put the spare on NEW TIRE and it still pulls hard to the right and the steering wheel wobbles back and forth.

WHAT DO YALL THINK IS THE PROBLEM? Do you think it is the allignment still or something else?